Improved burglar-alarm



A. G. HUTCHINSON.

Buglar Aarm.

Patented- July 13, 1869.

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ANDREW GEORGE HUTGHINSON, OF STONEYOROFT, NEAR LIVERPOOL, GREAT BRITAIN7 ASSIGNOE TO THOMAS vROVVLAND AND HENRY ROWLAND.

Letters Pittem No. 92,610, dazed .my 13, 1869.

IMPROVED BURG-LAR-ALARM.

The Schedule referred to in these Letters Patent and making part of the same.

beinghad to the accompanying drawings, making partv of this specication, in which- Figure l is a perspective view of the alarm applied to a door, ready to give a signal should an attempt be made to open the door. v

Figure 2 is a section, taken through the instrument in the vertical plane indicated by the line y y in g. 3.

Figure 3 is a horizontal section through theinstrument, taken in the plane'indicated by the line :v x in Similar` letters of reference indicate corresponding parts in the several gures.

The object of the invention is to combine, in a' very compact and portable instrument, a device which will offer resistance to the opening of doors and windows with mechanism which will produce an audible alarm or signal in the event of aburglarious attempt to open d2, and ou its front end a wedge, D', is formed, which inclines from the upper terminationof tube C to a a door or window thus secured.

The nature of my inventionconsists-1- l i First, in a .movable wedge or inclined plane, formed on one end of a loaded lever, and provided With adevice forlatching it in a depressed position, inr combination with alarmmechanism,vwhich, whenitiswound up,

will `be set free by the depression of said wedge, as will behereinafter explained.

Secondly, in providing the caseor box, which cntains the alarmmechanism, with spikes on its bottom, Which will catch into a floor, or other object, and serve, in

coniunction with the movable-Wedge fastening, to resist an attempt to open a door or window, as will be hereinafter explained. v 'v To enable` others skilled in the art to understand my invention, I will describe its construction and operation. Y

In the accompanying drawings- A represents a case or box, which is closed at bottom and open attop, and which may bel made of lwrought sheet-metal or of cast-metal, of the cylindrical form shown,

Gis arectaugular tube extending out a short-distance from the side of the box A, at or near its bot tom, and B represents a bell, which is arranged just above the top of'thebox A, and supported upon the upper end of an upright rod E, to which rod the bell is secured, by means o f a nut, h, by removing which and the bell B', access can be had to the interior of the box A.

lThelower end of the bell-support E is'bent, and

fastened rigidly to thebottom of -box A, so as to afford a raised support for the frame of the alarm mechanism. The other support for this frame isis@ bar, l?, having right angle pointed ends I, which h ar is secured fast to' the bottom of box A, inside thereof, and its pointed ends protruded through the said bottom, so as to form holding-spikes, for preventing the instrument from slipping when arranged for operation.

The frame F is held down in place upon its supports by means of a hook, n, on the outer end of which a nut', N, is screwed tightly against the external surface of the boxl A.

'This frame affords bearings for shafts carryinga train of Wheels, and a spring, which latter-is upon the winding-up shaft e, the keyK of which is passed through' a hole made through the box A, as indicated in g. 3.

The escapement-wheel G is acted upon by vibrating pallets H, moving'on an arbor, and carrying the hammer J and a release-rod, g. Y

The hammer J is arranged so as to strikethe bell B, and the release-rod g is bent, and is so arranged that a portion of it will be beneath the inner loaded end of a lever, D, when this lever is in position indicated by black lines, ig. 2.

The lever D is pivqted to the tubular portion G, at

at (l, the vbevelled nose of which plays through a slot made through the top of tube O,and when the wedgeend or shortest arm of the lever D is pressed down fully, this bevelled nose will catch on one edge of the tube surrounding the said slot, as indicated in red lines,` fig. 2, thereby holding up the loaded end of the lever, and releasing the escapement.

The following is a deseription ofthe manner of applying the improved instrument to' a door:

The door is shut, andafter the striking-mechanism is wound up, and the loaded end of the lever depressed, the bevelled portion D is adjusted between the bottom edge of the door and the, sll or floor, and, b ya slight pressure upon case A, the spikes P ]will'pene'`I It' it is desired to prevent the front end D' of the lever. D from being casually depressed when the strikin g Yory alarm-mechanism is wound up, this may be done by a small eccentric or cam b, pivoted to the topof tube O, and provided with a thumb-button, b.

This cam b is so arranged that, when it is turned, as indicated in black, iig. 2, it will press against the nose of latch a, and, by holding down this latch, prevent the alamndnechanism from being casually started.

Having described my invention, t

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the pivoted lever D, catch a, and alarm, all substantially in the manner and for the purpose described.V

2. The button b' iu combination with the catch a,

| lever D D', and the alarm, all substantially as herein specified.

3. A portable burglar-s alarm, constructed substantially in the manner and for the purpose described. Witness my hand in matter Aof my application for a patent for improvement in burglar-alarms. Witnesses: y A. G. HUTGHINSON. Ron. H. NEWALL,

Accountant, 5,3 Famfly Strcct,1'fiverpool, ARCH. A. BANKS,

l 87 Husrisson Street, Lfivemlool. 

